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- // Copyright Louis Dionne 2013-2017
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
- #include <boost/hana.hpp>
- #include <boost/fusion/include/find_if.hpp>
- #include <boost/fusion/include/make_vector.hpp>
- #include <boost/mpl/quote.hpp>
- #include <type_traits>
- namespace fusion = boost::fusion;
- namespace mpl = boost::mpl;
- namespace hana = boost::hana;
- int main() {
- {
- //! [hana]
- auto tuple = hana::make_tuple(1, 'x', 3.4f);
- auto result = hana::find_if(tuple, [](auto const& x) {
- return hana::traits::is_integral(hana::typeid_(x));
- });
- //! [hana]
- (void)result;
- #if 0
- //! [hana-explicit]
- some_type result = hana::find_if(tuple, [](auto const& x) {
- return hana::traits::is_integral(hana::typeid_(x));
- });
- //! [hana-explicit]
- #endif
- }{
- //! [fusion]
- using Container = fusion::result_of::make_vector<int, char, float>::type;
- Container tuple = fusion::make_vector(1, 'x', 3.4f);
- using Predicate = mpl::quote1<std::is_integral>;
- using Result = fusion::result_of::find_if<Container, Predicate>::type;
- Result result = fusion::find_if<Predicate>(tuple);
- //! [fusion]
- (void)result;
- }
- }
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